Type-writing machine.



W. P. KIDDER.

TYPE WRITING MACHINE.

APPLIGATIUN FILED APILZZ, 1909 Patented M129, 1914 2 SHEETS-SHEBT 1.

HNEY,

W. P. KIDDER.

TYPE WRITING MACHINE.

APPLIOATION FILED APR. 22, 1909.

Patented De@.29,1914.

2 SHEETS-SHEET 2.

/NVENTH En srAfrns rar rio, f

WELLINGTON l. KIDDER, OF BOSTON, MASSACHUSETTS, A-SSIGNOR, BY MESNE ASSIGN- MENTS, TO THE NOISELESS TYPEWRITER COMPANY, OF MIDDLETOWN, CONNECTI- CUT, A CORPORATION 0F CONNECTICUT.

TYPE-WRITING MACHINE.

Application filed April 22, 1909.

To all whom t may concern: Be it known that I, lVnLLiNcToN P. Kippen, a citizen of the United States, re-

siding at Boston, in the county of Suiolk and State of Massachusetts, have invented certain new and useful Improvements 1n Type-Vriting Machines, of which the fol-- l nism disclosed in my former Patent, No.

567,241, patented September 8, 1896.

One of the objects of the inventionis to improve the touch of typewriting machines.

f Another object thereof is to provide improved actuating mechanism for the type carriers whereby they may be moved to the impression Vpoint with a positively accelerated velocity during the first portion of the stroke and a negatively accelerated velocity during the second portion of the stroke.

Another object of the invention is to provide actuating means such as will enable printing to be effected with a powerful pressure with a. correspondingly light touch.

Other objects will be in part obvious and in part pointed out hereinafter.

rllhe invention, accordingly, consists in the features of construction, combinations of elements and arrangement of parts which will be exemplified in the construction hereinafter set forth, and the scope of the application of which will be indicated in the following claims.

ln the accompanyingr drawings, wherein is illustrated Aone of the various possible embodiments of my invention, Figurel is a sectional view taken transversely through the machine, showing a type-bar action in its normal position of rest; Fig. 2 is a similar view showing'the parts in printing position. y

Similar reference characters refer to similar parts in both views of the drawings.'

Referring now to the drawings, 1 represents the frame of machine which, in the present instance, is provided with a cross support bar 2, a. ledge 3 and a table or plate Specification of Letters Patent.

Patented Dec. 29, 1914i.

serial No. 491,579.

which supports and across which the typebars are moved when thrust to impression. The center tieof the machine is shown at 5, the rear portion 6 of which extends upwardly to form a rigid backing for the platen carriage 7, the latter carrying the platen roll 8 and' the platen 10, which lies in front of the platen rail and receives the pressure of the printing instrumentalities. The platen carriage, in the present instance, rides upon the rail 11 for letter spacing, and i-s shiftable for different case printing, by means not shown, the rear portion of the' carriage sliding in suitable ways formed upon the rear portion 6 of the tie-rod. The type bar 12 moves in suitable grooves upon the tvpe plate 4, and the front of the bar is provided with a plurality of type faces which, when the type-bar is moved from the position in F ig. 1 to that of Fig. 2, effect printing upon the impression sheets positioned in front 'of the platen.

To the type-bar 12, at 13, is pivotally attached a pair of links 14 whose other ends are connected to the pivot 15 of a second link 16, the latter being pivoted at 17 to an adjustable bracket 18 secured upon the ledge 3 asby means of the set-screw 20, said setscrew operating to hold the brackets in a fixed position after adjustment, `which may be effected as bv means of the adjusting screw 21. To the pivot 15 is attached a second pair of links whose other ends are pivoted at 23 to an oscillatory cam member 21 pivoted at 25 upon a bracket 26 supported upon ledge 2. Member 24 is provided with a cam groove 27, which is traversed by a roller 28 mounted at one end of a rocker arm 30said arm beingv pivoted at 31 to an ear extending from bracket 26. At a suitable distance froin pivot 81of arm 30 a rod or link 32 is pivotally Vconnected as at 33, the other end of said link being connected with the key lever 34- at 35, the several key levers being mounted upon the shaft 86. A qslotted plate 37 forms a guide for the several key levers which are adapted to be ma.- nipulated byrneans of keys 38'. A. spring 4-0 attached to a hook l-1 in the frame of the machine, returns the key lever and the various operative parts of the key action to their normal position of rest after printing has `been effected.

Having thus described the construction of this embodiment of my invention, the opera` tion thereof may now be understood. -tWlien the key is pushed downwardly, said key, through rod 32, oscillates arm 30 from the position shown in Fig. 1 to that 'shown in Fig. 2. In that position, the three pivots 31, 33 and 35 are in a straight line, thus limiting the downward movement of the key lever 34 and effecting a noiseless arresting of the various parts. When the arm 30 moves from the position of Fig. 1 to that of Fig. 2, roller 2S, traversing the slot 27 of cam 24, moves the links 22 and the toggle constituted by links 16 and 14 from the position shown in Fig. 1 to that of Fig. 2, in whichposition the pivots 17, 15iand 13 of the toggle are in a' straight line. 15 of links 22 and the oscillatory member 24, which constitute the second toggle, are in a straight line. The cam slot 27 is so formed that at the beginning of the swinging motion of arm 30 the oscillatory member 24 will start slowly and move with a gradually ac celeratedvelocity to the middle portion of the movement, and, during the second portion of the stroke, with a negatively accelerated velocity. This operation is effected by the shape given the cam groove, and it will be seen that while the roller passes from the position shown in Fig. 1 to that shown in Fig. 2, the movement ofthe oscillatory member 24 will at first be comparatively small,

and thatthe knuckle-joint or toggle Whose center is represented by the pivot 15, will have completed the last portion of its closing movement, and the toggle whose center is illustrated at23 will also have completed its straightening movement. therefore, thatl this mechanism will cause a powerful pressure to be exerted by the face of the type upon the impression sheets of the platen with a correspondingly light pressure upon the keys. During the last portion of the movement, as the link 32 nearly assumes a straight line with the pivots 31 and 33, the power of the key-lever is of course lessened, but this is more than offset b v the power exercised by the cam. If desired, the position of pivot 33 may be so modified thatthe link 32 will not assume a straight line, as shown inFig. 2, with the pivots 31 and 35, but in this event it will be necessary to position a stop beneath the key-levers in order to prevent overthrow. Spring 40 assists 1n returning the parts to their former positions, and also breaks the joint between the arm 30 and the link 32.

It will, accordingly, be seen that I have provided a construction well adapted to attain, amongothers` all the ends and objects above pointed/out in a simple, yet efficient manner.

One important advantage of the present Likewise, pivots 25, 23 and It follows,

given the cam groove and the relation of the various 'parts so that the type-bar starts slowly, attains its maximum velocity at the middle portion of the stroke. and then moves with a gradually diminishing velocity during the latter portion of the stroke until the type faces are pressed into contact with the surface of the platen.

Among other advantages accruing herein, the inertia of the type-bar and associated parts are gradually overcome at the beginning of the stroke, thereby rendering it easy to start the same. The stroke has its greatest power at the end, and the entire action is substantially noiseless.

As many changes could be made in the above construction and many apparently widely different embodiments of this invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawingsshall be interpreted as illustrative and not in a limiting sense.

Having described my invention. what I claim as new and desire to secure by Letters Patent is:

1. In a typewriting machine, in combination, a platen, a ype carrier, a key lever and means intermediate the last two elements adapted upon actuation of said key lever to impart to said carrier movement inv a rectilinear direction with a positively accelerat'ed velocity during the first portion of the stroke and a-negativelv accelerated velocitv during the latter portion thereof, said means comprising a pluralitv of toggles, the end of one of said toggles being connected with the elbow of another.

2. In a tvpewriting machine, in combination, a platen, a type bar having a limited path of travel, a kev lever for actuating said tvpe bar, and a pluralitv of toggles interposed between the key lever and the type bar, one of said toggles acting to -limit the path of travel of said type bar and another of said toggles being connected with the elbow o f said first-mentioned toggle to move the same into extended position as it assumes extended positin itself.

3. In a typewriting machine, the/combi-4 nation with a platen, and a straight-thrust type-bar, of a key-lever, and a pluralitv of- I Vnation with a' platen, of a straight-thrust type-bar, a toggle interposed between a fixed portion of the machine and said type-bar, a toggle interposed between a lfixed portion of the machine and the joint of said firstmentioned toggle, and 'means connecting said second-mentioned toggle with the keylever.

In a typewriting machine, the combination with a platen, and a straight-thrust type-bar, of a toggle'interposed between a .fixed portion of the machine and said tvpebar and adapted when straightened to force the type-bar ton impression, a toggle interposed between a iixed portion of the machine and said First-mentioned toggle and adapted when actuated tostraigliten the same, a cam formed upon one member of said secondme'ntioned toggle, a key-lever, and means connecte,` ,'l. with said key-lever for traversing said ca'in, thereby actuating said secondmentioned toggle, whereby the type-bar will be thrust to im'pression.

6. In a typewriting machine, the combination with a platen, a type carrier and a toggle for pushing the type carrier to the impression point, of a toggle for straightening said inst-mentioned toggle, a key, a cam mechanism combined with said secondmentioned toggle and connected with said kev and means pivotally connected with said key-lever for actuating said secondmentioned toggle.

y'7. In a typewriting machine, the combination with a platen, an endwise movable type carrier, of a toggle comprising a pair of pivotally connected links interposed between the type carrier anda iXed support, a toggle comprising a pair of pivotallv connected links interposed between a iXed .support and said first-mentioned toggle and adapted when actuated to straighten the latter, a cam surface formed upon one of the links of said second-mentioned toggle, a key-lever. and means connecting said keylever with said cam adapted, when the key lever is depressed, to traverse the cam and .actuate said second-mentioned toggle.

S. In a typewriting machine, the combination of a platen, an endwise movable type-bar, a toggle comprising a pair of pivotallv connected links one of which is connected with the type-bar, a fixed support to which 'the other of said links is pivotallv connected` and means Jfor straightening said toggle tol force the type-barto the impression point, comprising a pair of pivotally vconnected links one of which is connected to the connection of the links of said first-mentioiied toggle, a fixed support to which the other link of said second-mentioned toggle is pivotally connected, a cam path formed upon one of the links of said second-mentioned toggle, an oscillatory arm provided with a roll adapted to traverse said cam path, a key-lever, and a` link connecting said arm With the key-lever. A

9. In a typewriting machine, the combination with a straight-thrust type-bar, a toggle comprising a pair of pivotally con nected links for actuating the type-bar, one of said links being pivotally connected with the type-bar, an adjustable stationary support to which the other of said links is pivoted, of means for straighteningsaid toggle, whereby the type-bar will be pushed to the impression point, comprising an oscillatory member, a fixed support upon which said member is pivotally supported, a link connecting said member with the point of connection of said first-mentioned links, said oscillatory member and the link connected therewith constituting a toggle, a` cam groove formed in said oscillatory member, an arm pivotally supported upon the support for said oscillatory member and having a roll which is adapted to traverse said cam path, a key-lever, and a link connecting said key-lever with said arm.

l0. In a typewriting machine, the combination with a platen, a straiglit-thrist typebar, and a key-lever, of means including three toggles interposed between the 'keylever and the type-bar for actuatingthe latter with xa positively accelerated velocity during the first portion of the stroke, and a lnegatively accelerated velocity during the,

latter portion of theQstroke. l1. In a typewriting machine, the combination with a platen, and a type-bar, of a key-lever, al cam and three toggles interposed between the key-lever and the typebar adapted, when the key-lever is depressed, to actuate the type-bar with a .positively accelerated velocity during the first portion of the stroke and a negatively accelerated velocity during the latter portion thereof.

12. In a typewriting machine, the combination with a platen, and a straight-thrust type-bar, of means for actuating the latter, comprising atoggle composed of a pair of pivotally connected links one of which is connected pivotally with `the type-bar, a fixed support upon which the other of said links is pivotally supported, a second toggle comprising an oscillatory member provided with a c am groove, a fixed ysupport upon which said oscillatory member ispivoted, a link connecting the intermediate portion of said oscillatory member with the point of connection of said first-mentioned links, a key-lever, an oscillatory arm having means adapted to traverse said cam groove, a key-lever, and a link connecting said oscillatory arm with said key-lever, said cam groove being sc shaped that when said keylever is depressed and the means upon said oscillatcrjgf arin begins to traverse said cam fr n fi-e moved toward 'a link between the second-mentioned toggle and the key-lever.

14;' In a typewriting machine, the combination with a platen, `a direct-thrust typebar, and a key-lever, of means interposed between the key-lever and type-bar for actuating the same, comprising a toggle directly connected with said type-bar, a toggle pivotally connected with said first-mentioned toggle and adapted to actu-ate the same, cam means combined with said second-mentioned toggle, and means cooperating with said cam to actuate the toggle which is connected with p the key-lever.

n 15. In a typewriting machine, the combination with a platen, a direct-thrust type'- bar, and a key-lever, of means interposed between the key-lever and type-bar for actuating the same, comprising a toggle directly connected with said type-bar, a toggle connected with said first-mentioned toggle and adapted to actuate the same, cam means .combined with said second-mentioned tog- (gle, and link and lever mechanism coperatlng with said cam means and connected with said key-lever whereby', when the latten is depressed, the type-bar will be thrust to the impression point upon the straightening of both of said toggles.

16. In a typewriting machine, the combination with a type-bar, and a key-lever, of intermediate mechanism for transmitting motion from one to the other, including three toggles to silently arrest the movement of the key lever and type baras the toggles assume extended position.

17. In a typewriting machine, the combination with a type-bar, and a key-lever, of

intermediate mechanism for transmitting motion from one to the other, including three toggles arranged in series and adapted silently to arrest the movement of the key-lever and type-bar as they assume extended position.

18. In a typewriting machine, the combination with a platen, a type bar, a key lever, and intermediate mechanism therebetween for transmitting motion from one to the other including a plurality of toggles, said toggles forming silent stops in their extended positions for limiting the movements of the type bar and key lever.

19. In a typewriting machine, the combination with a platen, a type bar, a key lever, and intermediate mechanism therebetween for transmitting motion from one to the other -including a plurality of toggles connected in series, the construction and arrangement of said toggles being such as to gradually and silently arrest the movement of the moving parts when in extended position.

20. In a tyepwriting machine, the combination with a platen, a type bar, a key lever, and intermediate mechanism therebetween for transmitting motion from one to the other including a plurality of toggles, one of which yis connected to said typeu bar and another to said key lever, the construction and arrangement of said toggles being such as to gradually and silently arrest the move-l ment of the moving parts when in extended position.

21. In a typewriting machine," in combination, a movable member, means for moving said member, and means for arresting the movement of said movable member including a plurality of toggles adapted to be moved to straightened position, the end of one of said toggles being pivotally connected with the elbow of the other toggle.

In testimony whereof I atlix my signature, in the presence of two witnesses.I

WELLINGTON P. KIDDER.

lVitnesses z I BoswELL S. BARRoWs, RUTH O. ANDERSON. 

